Worlds First Solar Powered Football May Help the Blind Play

According to GreenMuze, the solar powered balls panels power built-in motion sensors and an audio device which could potentially enable visually impaired people to play soccer/football � each time the prototype is kicked, it emits a tracking sound.

Source:
http://www.inhabitots.com/2010/06/23/worlds-first-solar-powered-soccer-ball-could-help-the-blind-play-soccer/